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Vulnerability record · CVE-2021-22784 · published 21 July 2021

CVE-2021-22784: Schneider-electric c-bus toolkit missing authentication for critical function vulnerability

Schneider Electric · C Bus Toolkit

A CWE-306: Missing Authentication for Critical Function vulnerability exists in C-Bus Toolkit v1.15.8 and prior that could allow an attacker to use a crafted webpage to obtain remote access to the system.

5.7 CVSS 3.1 Medium EPSS 12% · top 4.0% CWE-306 · Missing authentication for critical function
5.7CVSS 3.1 base score, v2 3.5
12%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A CWE-306: Missing Authentication for Critical Function vulnerability exists in C-Bus Toolkit v1.15.8 and prior that could allow an attacker to use a crafted webpage to obtain remote access to the system.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-194-04 ProductVendor Advisory
https://www.tenable.com/security/research/tra-2021-50 ExploitThird Party Advisory
http://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-194-04 ProductVendor Advisory
https://www.tenable.com/security/research/tra-2021-50 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-5402Schneider-electric c-bus toolkit improper privilege management vulnerabilityA CWE-269: Improper Privilege Management vulnerability exists that could cause a remote code execution when the transfer command is used over the net…EPSS 0.67%8.8CVE-2021-22748Schneider-electric c-bus toolkit path traversal vulnerabilityA CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability exists that could allow a remote code executio…EPSS 1.9%8.8CVE-2021-22717Schneider-electric c-bus toolkit path traversal vulnerabilityA CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability exists in C-Bus Toolkit (V1.15.7 and prior) th…EPSS 39%8.8CVE-2021-22719Schneider-electric c-bus toolkit path traversal vulnerabilityA CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability exists in C-Bus Toolkit (V1.15.7 and prior) th…EPSS 41%7.8CVE-2021-22716Schneider-electric c-bus toolkit incorrect permission assignment vulnerabilityA CWE-732: Incorrect Permission Assignment for Critical Resource vulnerability exists that could allow remote code execution when an unprivileged use…EPSS 0.77%7.8CVE-2021-22718Schneider-electric c-bus toolkit path traversal vulnerabilityA CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability exists in C-Bus Toolkit (V1.15.7 and prior) th…EPSS 27%7.2CVE-2021-22720Schneider-electric c-bus toolkit path traversal vulnerabilityA CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability exists in C-Bus Toolkit (V1.15.7 and prior) th…EPSS 31%8.8CVE-2026-67277MikroTik RouterOS btest missing authentication leaks kernel memory and crashes kernelRouterOS accepts a "related" btest connection before the primary session is authenticated, letting an unauthenticated client start an IPv4 UDP test. …KEVEPSS 1.6%analysed

Source: NIST National Vulnerability Database (record CVE-2021-22784), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.